openssl: 1.1.1f → 1.1.1g
openssl: 1.1.1f → 1.1.1g

Fixes: CVE-2020-1967

Segmentation fault in SSL_check_chain (CVE-2020-1967)
=====================================================

Severity: High

Server or client applications that call the SSL_check_chain() function during or
after a TLS 1.3 handshake may crash due to a NULL pointer dereference as a
result of incorrect handling of the "signature_algorithms_cert" TLS extension.
The crash occurs if an invalid or unrecognised signature algorithm is received
from the peer. This could be exploited by a malicious peer in a Denial of
Service attack.

OpenSSL version 1.1.1d, 1.1.1e, and 1.1.1f are affected by this issue.  This
issue did not affect OpenSSL versions prior to 1.1.1d.

Affected OpenSSL 1.1.1 users should upgrade to 1.1.1g

This issue was found by Bernd Edlinger and reported to OpenSSL on 7th April
2020. It was found using the new static analysis pass being implemented in GCC,
- -fanalyzer. Additional analysis was performed by Matt Caswell and Benjamin
Kaduk.

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